Electric discharge device



April 25, 1939. 0. BAIER El AL 2,156,048

ELECTRIC DISCHARGE DEVICE FiledMay 15, .1938

Patented Apr. 25, 1939 UNITED STATES PATENT OFFICE ELECTRIC DISCHARGEDEVICE Otto Baier and Annemarie Katsch, Berlin, Germany, assignors to C.Lorenz Aktiengesellschaft, Berlin-Tempelhof, Lorenzweg, Germany, a com-D y Application May 13, 1938, Serial No. 207,754 In Germany May 15, 19374 Claims. (Cl. 250-275) The present invention relates to electricdisrangement shown in Fig. l. The difference becharge devices and moreparticularly to such detween these two designs is that the leading-invices adapted for generation of very high freconductors 5 are fixed inholes at the outer edge quency oscillations. which merely project intothe base portion 3.

5 As well known, the mechanical stability of The manufacturing of thetubes as above de- 5 electric discharge devices may be improved byscribed is effected in such manner that the leadmaking them entirely orpartially of a ceramic ing-in conductors are at first sealed to the basematerial. Electron discharge tubes of this type portion by the agency ofa material having a high are preferably employed for the generation ofmelting point such as hard glass or metal wherevery high frequencyoscillations at which the inupon the various electrodes are attached totheir 10 ductance value of the leading-in conductors is appertainingleading-in conductors. Finally, a of great importance and where normalsockets material having alower melting point is employed cannot beemployed. for the seal 8 between the cylindrical membed l The presentinvention deals with such discharge and the base portion 3. l5 tubeswhich essentially consist of a ceramic ma- It is also within the scopeof the invention to terial and in which the leading-in conductors areapply the above described shape of the leading-in formed as a bail andrigidly attached to the base conductors to tubes of other types. Theessential portion of the discharge vessel at two points. The feature isthat the leading-in conductors present advantage obtained on account ofthe structure the shape of a bail and are attached to the base of theelectron discharge tube according to the portion of the tube at twopoints. 20

invention is that this tube may be directly at- What is claimed is:tached to a supporting means and that the lengths 1. An electricdischarge device comprising a of the leading-in conductors to thevarious elecdischarge vessel composed of diiferent portions, trodes ofthe tube present minimum lengths. a plurality of electrodes arranged insaid vessel,

The possibility for a displacement of the leadand leading-in conductorsto the various elecing-in conductors which may occur when these 0C1 5.each of Said leading-in Con u or being leads are fixed only at one pointis substantially bail-shaped and sealed to said vessel at two points.

avoided on accoiuit of the bail-shaped leading-in 2. An electricdischarge device comprising an conductors and the method of fixing theseleadenvelope, a base portion of ceramic material, a ing-in conductors attwo points. plurality of electrodes arranged in said envelope, 30

The invention will be more readily understood d ai ap d leading-inConductors 130 s from the following description taken inconjuncelectrodes, said base portion having two circular tion with theaccompanying drawing, in which: rows of holes adapted to receive saidleading-in Fig. l is a cross sectional View through one emconductors inradial relation to each other. bodiment according to the invention; Fig.2 is a 3. An electric discharge device comprising a 35 bottom view ofthe arrangement shown in Fig. 1; discharge Vessel having 611% y c l a nwhile Fig. 3 illustrates a modification over the portion, a glass Coversealed 0116 6nd d arrangement shown in Fig. 1. ceramic base portionsealed to the opposite end In the figures, i represents a cylinder ofceramic hereof, a plurality of electrodes arrang in sa d materialcarrying at its upper end a cover 2 of envelope, and bail-shapedleading-in conductors glass which is elongated in the shape of a pipe tosaid electrodes, said base portion having two to which the vacuum pumpis connected and circular rows of holes adapted to receive said which issealed after an evacuation has been efleadin COIIGHCtOTS in ad a r ationto each fected. The remote end of the cylinder 1 is other.

covered by a base portion 3. Two circular rows 4. An electric dischargedevice according to 45 of holes 4 are arranged in the base portion 3 andclaim 1 and in which the different portions of extending throughout theentire thickness therewhich the discharge vessel is composed are heldof. These holes are adapted to receive the bailtogether by means of aseal and the leading-in shaped leading-in conductors 5 which afterhavconductors are sealed directly to the wall of the ing been broughtinto position are sealed to the discharge vessel by means of a materialhaving 50 base portion at two points 6 so that lateral benda highermelting point than the seal holding toing of these leads after the tubehas been finished gether the different portions of the vessel. is notpossible. Moreover, the tube may be direct- 1y placed in a fitting. OTTOBAIER.

Fig. 3 illustrates a modification over the ar- ANNEMARIE KATSCH.

